Yatsushiro Castle (八代城, Yatsushiro-jō) is the remains of a castle structure in Yatsushiro, Kumamoto Prefecture, Japan.

[1] In 1619, Mugishima Castle collapsed due to a large earthquake then Katō Kiyomasa's son Kato Tadahiro ordered his vassal Katō Masataka to build a new castle.

[2] In 1632, Hosokawa Tadaoki entered the castle by the Tokugawa shogunate's order and spent retired life in the kitanomaru compound of the castle.

[3] The castle is now only ruins, just some remnants of water moats and stone walls.

[4] Yatsushiro castle was listed as one of the Continued Top 100 Japanese Castles in 2017.